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Topic: barcode display (Read 2 times) previous topic - next topic

actarus92

Hi all
im looking for a screen to display barcodes from numbers.
there's a lot of screens so im lost !
I dont want to display numbers from barcodes but the vertical lines which could be scanned through a scanner.

Thanks for your precious help

Jerome

johnwasser

There are many styles of barcode.  Did you mean UPC-A?  http://en.wikipedia.org/wiki/Universal_Product_Code  That would be 95 pixels so a graphic LCD with a width of 95 or more should work.
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actarus92

Hi john
thanks for your quick reply.
I think UPC-A is the most used barcode so thats what i want.
thanks again john.


JimboZA

So you have numbers in a digital format, which you want to display as analog (the barcode) and scan back in to be digital?

Roy from ITCrowd: Have you tried turning it off an on again?
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johnwasser

128x64 is a common Graphic LCD size and that would be plenty of resolution for a UPC-A barcode.  Something like http://compare.ebay.com/like/251260949920 for $6.09 on eBay.

Since each barcode 'digit' is 7 pixels wide you would have plenty of resolution to display the digits under the bars if you want both.
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AWOL

What about an e-ink display?
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
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actarus92

Ok.Jimbo youre right.in fact i would like 2 screens.the first to display the barcode number and when you validate it, it will show the digital barcode on the second screen.
So i think i need simple number display screen and a digital barcode screen.
Telecomando yes i want the displayed barcode to be scanned so do you think it will be difficult to find
?
Thanks again
Jerome

actarus92

I Just red your last post and asking 2 questions.
Awol do you mean e ink like kindle fire or else ?
Jhon your ebay link is what i want and may be one screen is enough
To show numbers and the barcode under it !!!
You are my saver ...

JimboZA

But I'm wondering why you have to display as a barcode, a number which you have digitally in the first place, just to scan it in again as a new digital number.

Unless I'm missing something, why don't you just pass the number from the digital source to the digital user?
Roy from ITCrowd: Have you tried turning it off an on again?
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actarus92

Caus i want the barcode to be red by a scanner.
So it has to be digital code not numbers.
Its for handicaped persons.
I want them to enter a number and then it loads the graphical code which we will  be scanned by others.sorry for my bad english.

actarus92

i understand what you mean Telecommando.thank you.
May be e-ink is the solution but its a new technology so it's more expensive than lcd and elses...
If i find a solution i ll tell you.
But i think you're right whan you say scanners are better now.
wait and see... :D

I really want to help these people and find a solution for them.
 

Flatlander

While not as cheap as a typical LCD you can use an e-paper display, Adafruit sells a few graphic eInk dev boards for roughly $35 USD which are advertised as being able to produce a barcode readable by a laser scanner. 

You could always also use a thermal printer to physically produce the barcode, they cost about $40-50 new, but you might be able to find one for a lot less (salvage/auction).

odometer


Caus i want the barcode to be red by a scanner.
So it has to be digital code not numbers.
Its for handicaped persons.
I want them to enter a number and then it loads the graphical code which we will  be scanned by others.sorry for my bad english.


Why does the information need to be scanned?
Why not just show the information so that a human can read it?
If a machine is supposed to read the information, what is the purpose of the scanner? Why not just connect directly to the machine?
In other words: does the information really need to be scanned? Or is there a way to do without the use of a scanner?

If you don't mind me asking:
What kind of information is this, exactly?
Do different numbers stand for different items, in a code? (for example, different meals on a restaurant's menu)
Or do the numbers stand for numbers themselves? (for example, an amount of money, or a calendar date)

Riva


While not as cheap as a typical LCD you can use an e-paper display, Adafruit sells a few graphic eInk dev boards for roughly $35 USD which are advertised as being able to produce a barcode readable by a laser scanner. 

In the UK Barnes & Noble have reduced the price of there 'NOOK Simple Touch eReader' to £29 ($45). I hopefully have one on the way and will then face the dilemma of using it as a book or hacking it to see if I can use the e-ink display.
http://forum.arduino.cc/index.php?action=unread;boards=5,67,10,11,66,12,15,17,21,22,23,24,25,29;ALL

actarus92

Hi
Quote
Why does the information need to be scanned?

the barcode has to be red by different scanners thats why i need the barcode and not numbers

I feel a little bit lost  :(

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